Guam weather in December 2025
December
Guam weather in December 2025
December
Day
30 °C
Night
25 °C
Sea
28 °C
Precipitation
129 mm
in month
Rainy days
12 days
in month
Daylight
11 hours
average
Sunshine
5 hours
average
Humidity
83 %
Day
30 °C
Night
25 °C
Sea
28 °C
Precipitation
129 mm
in month
Rainy days
12 days
in month
Daylight
11 hours
average
Sunshine
5 hours
average
Humidity
83 %
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Weather overview and FAQs
Weather overview
In December in Guam, the average air temperature ranges from 30 °C (87 °F) during the day to 25 °C (76 °F) at night. There are 12 days of rain on average, where the rainfall is 129 mm (5.08 in).
Is December a good month to visit Guam?
December is one of the best months to visit Guam. The daily temperatures in this month reach pleasant 30 °C (87 °F). The temperature of the sea will be perfect at 28 °C (83 °F). At night, temperatures hover around a pleasant 25 °C (76 °F).
What temperature can I expect during the day in December in Guam?
In Guam in December, the average daily temperatures will be 30 °C (87 °F). The great temperature for lying by the sea or pool and sunbathing, everywhere else you will probably be a bit hot. Don't forget to drink during the day, in these temperatures you should hydrate yourself a lot.
What is the sea temperature in Guam in December?
In December in Guam expect the sea to be warm at 28 °C (83 °F). This temperature is someone's dream come true, while for someone it may no longer be ideal for the purpose of refreshment.
How heavy is the precipitation in December in Guam?
In December in Guam, there is 129 mm (5.08 in) rainfall, which means on average 4 mm (0.17 in) rainfall per day.
How many rainy days can I expect in December in Guam?
In December in Guam, we can expect 12 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 2.8 days of the week, or in general - 40 % days.
What is the air temperature in December in Guam at night?
The average night temperature in Guam in December is 25 °C (76 °F). A very pleasant temperature for long evening walks, fun over a drink outside, or doing sports in the morning. If possible, look for a hotel with air conditioning.
How many sunny hours can I expect in Guam in December?
In December in Guam, you can expect around 5 hours of sunshine.
Is the sea in Guam warmer in December than in November?
No, the sea is not warmer in Guam in December than in November.
Is December part of the dry season in Guam?
No, December is not a dry month in Guam, expect rain approximately 12 days in a month.
How long is the day (from dawn till dusk) in Guam in December?
The length of daylight in Guam in December is 11 hours.
Is it hot in December in Guam?
In December in Guam, you will enjoy nice warm weather, but it will also be pleasant and you probably won't feel hot.
How windy is Guam in December?
In Guam in December, there will be an average wind scale of 6.
What is the humidity in December in Guam?
Humidity in Guam in December is 83 %. This humidity is rather above average, but except for sensitive individuals, it should not be a problem.
Is Guam rainier in December than in November?
No, December in Guam is not a rainier month than November.
How does the sea temperature evolve during the month in Guam in December?
Guam has a decreasing trend of the sea temperature during December - from 29 °C (83 °F) in the first days of the month to 28 °C (82 °F) in the last days of the month.
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